The effect of ferric ion on the rate of ferrous oxidation by Thiobacillus ferrooxidans

In this study, the effect of ferric ion and cell concentrations on the oxidation of ferrous ion by T. ferrooxidans was investigated. Ferric ions competitively inhibited ferrous ion oxidation by the bacteria. The inhibitory effect of ferric ion was, however, reduced by increasing cell concentration....

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Bibliographic Details
Published in:Applied microbiology and biotechnology 1996-06, Vol.45 (5), p.688-691
Main Authors: NYAVOR, K, EGIEBOR, N. O, FEDORAK, P. M
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biology of microorganisms of confirmed or potential industrial interest
Biotechnology
Fundamental and applied biological sciences. Psychology
Mission oriented research
Physiology and metabolism
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Summary:In this study, the effect of ferric ion and cell concentrations on the oxidation of ferrous ion by T. ferrooxidans was investigated. Ferric ions competitively inhibited ferrous ion oxidation by the bacteria. The inhibitory effect of ferric ion was, however, reduced by increasing cell concentration. The apparent ferric ion inhibition constant did not change with increasing cell concentration. The ferrous ion oxidation kinetics in the absence and presence of ferric ion changes from the standard Michaelis-Menten type at low cell concentrations to pseudo-first-order kinetics at high cell concentration.
ISSN:0175-7598
1432-0614
DOI:10.1007/s002530050749